SB-610/303 CONNECTIONS

[Stu Lyon]

Heytubeguy wrote:

>Just received a SB-303 and  a  SB-610 scope.  If I want to 'see' received signal on the scope from the 303, what connection(s) do I use on the back of the 303.  Help greatly appreciated,  Joe
>
>
>  
>
Hi Joe,
It's not that easy!! First off, the SB-610 must have the right IF 
transformers for the -303's IF frequency (3394KHz), which it probably 
does. Second there is no back-of-the-panel connection on the -303 for 
the -610. You must get inside to pick up the output of the IF strip just 
before the detector. And third, the SB-610 manual describes that the 
monitor is "for any tube-type receiver". The -303 may have too low an 
output to run the -610 without further amplification.

Most do not use the receiver function of the SB-610 because of its 
limited usefullness in measuring the performance of a far-off 
transmitter. Page 34 of the -610 manual warns about the receiver 
changing the characteristics of the received signal. However, the SB-610 
is a very fine transmitter monitor.

A shortened SB-610 manual is at:  
ftp://bama.edebris.com/bama/heath/sb610/  sb610.djvu

73, Stu W6CUX

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